Scope

This timeline follows the formation, evolution, and collapse of the bipolar order centered on the United States and the Soviet Union.

Inclusion rule

Include events that materially changed bloc structure, nuclear risk, proxy-war dynamics, alliance systems, or the global ideological balance.

Why this timeline exists

The Cold War defined the geopolitical structure of the late 20th century. It shaped war, development, decolonization, science, intelligence, and the global language of ideology and security.

Key phases

  • Early bloc formation
  • Nuclearization and alliance hardening
  • Proxy wars and decolonizing worlds
  • Détente and renewed confrontation
  • Soviet crisis and end of bipolarity

Anchor events